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This is to certify that your paper entitled «Traveler information provision strategies (visual, aural, textual, or multimodal) and their effects on the cognition of time» was indexed with 20 pages, in the CIVILICA citation database, code COI:TTC15_094, after evaluation and approval of the referees of the "The 15th International Conference on Traffic and Transportation Engineering held in Tehran 2016.

While offering our congratulations on the indexation of your paper, please be informed that this certificate is prepared based on the information submitted by the secretariat of the above conference and the information contained in the CIVILICA database, and the accuracy of its content can be inquired at any time through link provided at the bottom of the page or scanning the code image.